#define _CRT_SECURE_NO_WARNINGS 1

#include <stdio.h>
#include <math.h>

int main()
{
	int n = 0;
	scanf("%d", &n);
	int t = n;
	int sum = 0;
	for (int i = 0; i < 5; i++)
	{
		sum += n;
		n += t * pow(10, i);
	}
	printf("%d", sum);
	return 0;
}